Separate Venipunctures Were Performed to Collect Three Sets of Blood

question 12

Multiple Choice

Separate venipunctures were performed to collect three sets of blood cultures from a patient with an artificial heart valve.The first and third sets grew a gram-positive pleomorphic rod in 1 of 2 bottles while the second set had no growth in either bottle.What is the most likely explanation for these findings?

• A)The patient probably has an infection with Clostridium spp.
• B)The blood cultures were contaminated with skin flora.
• C)The blood cultures were probably contaminated in the laboratory.
• D)The patient probably has an infection with Bacillus spp.

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Definitions:

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